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(No Model.) 2 Sheets-Sheet 1.

. U. G. GRAHAM.

.STEAM BOILER.

Patented July 7,1891.

(No Model.)

2 Sheets-Sheet 2.

U. G. GRAHAM'.-

STEAM BOILER.

Patented July '7, 1891.

mmm, DA c.

UNITED STATES ULYSSES G. GRAHAM, OF NYAOK, NEV YORK, ASSIGNOR OF ONE-HALF TO PATENT OFFICE. i

LANOELOT OOPLESTON, OF SAME PLACE.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 455,318, dated July 7, 1891. i. Application filed August 22, 1890. Serial No.362,792. (No model.)

To all whom it may concern,.-

Be it known that I, ULYssEs G. GRAHAM, of i; Nyack, Rockland county, and State of New York, have invented a certain new and useful Improvement in Steam Boilers, of which the following is a specification. y

This inwention relates particularly to steam- Y boilers-having water-tubes around which the .fpro'ducts of combustion circulate; and the obro ject is to provide a complete circulation and break up the water before it reaches the steam-chamber, where the water and steam separate, the water flowing back into the boiler. Y x I will describe a boiler embodying my invention, and then point out the novel features in the claims.

In the accompanying drawings, Figure 1 is f afront elevation of a boiler, partly in seczo tion, embodying my invention. Fig. 2 is a rear elevation. Fig. 3 is an enlarged section through the line a; of Fig. 1, looking in the direction of the arrow. Fig. 4 is a section through the line y y of Fig. 3. Fig. 5 is a section through the line o t of Fig. 6, showing a slightly-modified construction. Fig. 6 is a sectional side elevation through the line tu w of Fig. 5. Similar letters of reference indicate like 3o parts in all the iigures ofthe drawings.

Referring by letter to the drawings, A des-- ignates the furnace or fire-chamber; A, the grate; A2, the ash-pit below the grate, and A3 the outlet for smoke and products of combus- 3 5 tion. l Bdesignates a series of manifold pipes extending lengthwise of and above the iire chamber A. These pipes B are arranged one above the other at the central portion of the 4o boiler-casing and are shown as staggered.

Each pipe B has a series of holes or perforations at opposite sides throughout its length,

"i and the ends of laterally-extending pipes B are fitted into these holes a, so as to communicate with the interior of the pipe B. The outer ends of the pipes B are closed. Each pipe B has a diaphragm b, extending longitudinally through it, so that each pipe is divided into two portions or chambers Z9 bgnot 5o communicating with each other excepting through the pipes B', which are also manifold or provided with a longitudinal diaphragm b3. The diaphragms b3 in the pipes B do not extend entirely to the ends of said pipes; but the diaphragms bgand-also the diaphragms b V55 extend across the full inner diameter of the respective pipes.

O designates a feed-water pipe extending along the vfurnace adjacent to the grate and y receiving water from any source of supply 6o through the pipe c. The pipe O communi-ff` cates with a transverse water-pipe C atthe' rear of the furnace, and this pipe O' communicates with the respective pipes B through vertical pipes C2. It will be observed that the pipes C2 communicate with one chamber only of the pipe B. In this case the chamber b and the other chamber b2 communicate with a steam-chamber D through pipes D.

All portions of the pipes B and B are designed to be filled with Water, and it will be seen that water entering the chamber b of the pipe B will circulate through the pipes B', beneath the diaphragms b3, around the ends 7 5 thereof, vand back over the top of the diaphragms to the chamber b2, thence to the steam-chamber D, all as indicated by the arrows.

The steam-chamber D extends over the 8o top of the boiler-casing and has transverse partition or separator d within it. This separatord is here shown as transversely inclined, the highest edge being above and adjacent to the water and steam-entrance from the pipes D. The separator d does not extend the full length of the chamber D,/but is so constructed that steam may pass around the ends, as shown by the arrow in Fig. l. By this construction it will be seen that water and steam 9o entering the chamber D will strike against the separator d, the steam passing around Athe ends thereof, as before stated, to the steam-pipe d', and the Water falling to the bottom of the chamber D is conducted back to the pipe O through return-tubes d2, which, as shown, provide a communication between the chamber D and the pipe O. As before stated, each pipe B is in effect two pipes, and in Figs. 5 and 6 I have shown an analogous Io'o arrangement of pipes for conveying the water and steam, but in which two pipes B are emro the chamber in the upper portion of each pipe.

Having described my invention, what I claim is l. In a steam-boiler, the combination, with the feedavater pipe, of a number of manifold 15 or chambered pipes, a chamber of each of said pipes having an independent connection with the feed-water pipe, and the chambers communicating one with the other through laterally-eXtending pipes, substantially as 2o speciiied.

2. In a steam-boiler, the combination, with pipes, each having a longitudinal diaphragm extending transversely and forming two chambers closed at opposite ends, of latera5 ally-extending pipes providing a communication between said chambers,substantially as specified.

In a steam-boiler, the combination, with a feedwater pipe, of a series of manifold 3o pipes independently communicating with the feed-water pipe, pipes extending from the manifold pipes, providing a communication between the chambers thereof, and a wat/er' and steam chamber communicating with-each of the manifold pipes and return water-pipes, substantially as speciiied.

et. In a steam-boiler, the combination, with Water-pipes substantially such as described, of asteam and water chamber connected with said pipes, a separator in thechamber arranged longitudinally of and inclined transversely to the length of the chamber, the said separator being within the line of discharge of the water-pipes and made shorter than the chamber, whereby openings are provided for the passage of steam,and a pipe or pipes for conducting Water from said chest to a feedpipe, substantially as specified.

5. The combination, with the horizontal water-pipes having'longitudinal diaphragms forming chambers therein, of pipes extending from opposite sides of the iirst-named pipes and having longitudinal diaphragms, providing a communication between the chambers of the first-named pipe, and inlet and outlet pipes for the above-named pipes, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ULYSSES Gr. GRAHAM. lVitnesses:

S. E. GARDNER, L. CoPLnsroN. 

